Why it works: Lemon and sugar are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Lemon Pie
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Preheat the oven to 350°F (175°C).
In a bowl, mix the grated lemon rind, lemon juice, egg yolks, whole egg, water, sugar, and cornstarch until well combined.
Pour the mixture into a pie crust.
Make the meringue
In another bowl, beat the egg whites until stiff peaks form, then gradually add the powdered sugar.
Spread the meringue over the pie filling.
Bake
Bake for 1-2 minutes until the meringue is lightly browned.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Lemon + sugartop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Lemon + eggtop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
-
Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
Lemon and sugar barely smell alike, yet cooks put them together in 53,532 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Enrich the filling and help it set into a thick, smooth custard when heated.
- Cornstarch
- Thickens the lemon filling so it holds a clean cut after cooling.
- Lemon juice
- Adds the sharp acidity that balances the sweetness of the filling.
- Sugar
- Sweetens the filling and helps balance the tartness of the lemon.
- Powdered sugar
- Dissolves easily into the whipped whites, helping the meringue stay stable and glossy.
The step that matters
Baking the meringue. Sugar-stabilized egg white foam sets and browns quickly, so it needs close watch. Overbaking can toughen it and cause weeping, while underbaking leaves it soft and unset.
Swap the lemon
How well each one fits the dish's main ingredients (egg, sugar):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
Fit is the average pairing score against egg, sugar. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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